The Uniform Positive Column of an Electric Discharge in Mercury Vapor

1930 ◽  
Vol 35 (10) ◽  
pp. 1238-1252 ◽  
Author(s):  
Thomas J. Killian
Keyword(s):  
Electric Discharge ◽  
Positive Column ◽  
Mercury Vapor

scholarly journals Electric discharge during electrosurgery

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Alexey Shashurin ◽  
David Scott ◽  
Taisen Zhuang ◽  
Jerome Canady ◽  
Isak I. Beilis ◽  
...  
Keyword(s):  
Electric Discharge ◽  
Rayleigh Scattering ◽  
Positive Column ◽  
Plasma Electron ◽  
Atmospheric Plasma ◽  
Plasma Parameters ◽  
Breakdown Threshold ◽  
Half Wave ◽  
Electrical Conductivities ◽  
The Moment

Abstract Electric discharge utilized for electrosurgery is studied by means of a recently developed method for the diagnostics of small-size atmospheric plasma objects based on Rayleigh scattering of microwaves on the plasma volume. Evolution of the plasma parameters in the near-electrode sheaths and in the positive column is measured and analyzed. It is found that the electrosurgical system produces a glow discharge of alternating current with strongly contracted positive column with current densities reaching 103 A/cm2. The plasma electron density and electrical conductivities in the channel were found be 1016 cm−3 and (1-2) Ohm−1cm−1, respectively. The discharge interrupts every instance when the discharge-driving AC voltage crosses zero and re-ignites again every next half-wave at the moment when the instant voltage exceeds the breakdown threshold.

The Mechanism of the Positive Column in Mercury Vapor at Intermediate Pressures

1938 ◽  
Vol 53 (7) ◽  
pp. 556-563 ◽  
Author(s):  
Elliot Q. Adams ◽  
Bentley T. Barnes
Keyword(s):  
Positive Column ◽  
Mercury Vapor
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